2221142642 has 8 divisors (see below), whose sum is σ = 3338261100. Its totient is φ = 1108388944.

The previous prime is 2221142621. The next prime is 2221142681. The reversal of 2221142642 is 2462411222.

It is a Cunningham number, because it is equal to 47129²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 2221142641 + 1 = 47129^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2221142642² = 9866949272221480328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089917 + ... + 1091952.

Almost surely, 2^2221142642 is an apocalyptic number.

2221142642 is a deficient number, since it is larger than the sum of its proper divisors (1117118458).

2221142642 is a wasteful number, since it uses less digits than its factorization.

2221142642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182380.

The product of its digits is 3072, while the sum is 26.

The square root of 2221142642 is about 47129.0000106092. Note that the first 4 decimals coincide. The cubic root of 2221142642 is about 1304.7445254758.

Adding to 2221142642 its reverse (2462411222), we get a palindrome (4683553864).

The spelling of 2221142642 in words is "two billion, two hundred twenty-one million, one hundred forty-two thousand, six hundred forty-two".